I'm still in contact with the breeder I bought the boys from, keeping her updated on their health and well being. And I keep watch on her facebook just because her work with rats is fascinating.
Well, after the last litter, which I got my boys from, moved out, she found out one of the females kept in that cage for socializing the pups, had become pregnant. A lesson learned to separate the boys and girls a bit earlier than used to. At least this female weren't relate to that litter, so whatever sneaky male saw his opportunity, it's not gonna be inbreeding!
The pups have been born and grown enough fur to try identify the possible father. And the breeder determined.. it's Duke! MY boy Duke!
She seems pretty sure of it. She's gonna keep the pups as new breeding litter, even if she hadn't planned for a new one this soon - but only got praise for how pretty and healthy they are.
Duke oughta be proud, although shameless XD